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hesitation and sometimes stall upon acceleration - 170

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DOMER94
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hesitation and sometimes stall upon acceleration - 170

Post #1 by DOMER94 » Sun Mar 07, 2010 7:00 pm

looking for advice. when accelerating from a stop , my 61 with stock 170 / 1 bbl , will have a tendency to stall. unless i back off the gas and gently apply throttle , it will stall if i start laying into it. car starts and idles fine. no popping or smoking issues. is there any adjustment im overlooking?

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Re: hesitation and sometimes stall upon acceleration - 170

Post #2 by rbohm » Sun Mar 07, 2010 7:33 pm

8) try adding some timing.
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Re: hesitation and sometimes stall upon acceleration - 170

Post #3 by CZLN6 » Sun Mar 07, 2010 7:37 pm

Howdy Domer:

I believe you are looking at a carb rebuild opportunity. A '61 170 should have a side bowl Holley one barrel that is about the easiest ever carb to rebuild. Your problem is likely that the accelerator pump inside the carb is worn out and not squirting on acceleration, hence the stumble. You might just check to see that the linkage is there and hooked up before you start a rebuild. Good luck and keep us posted.

Adios, David
co-author of the Falcon Performance Handbook
http://www.falcon6handbook.com/

DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #4 by DOMER94 » Sun Mar 07, 2010 8:37 pm

thanks. does anybody have a good carb rebuild kit source? i will try a couple degrees advance also , but to tell the truth, once rolling , there is good throttle response and general engine running.

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LaGrasta
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Re: hesitation and sometimes stall upon acceleration - 170

Post #5 by LaGrasta » Mon Mar 08, 2010 12:54 pm

$20 will get you a decent rebuild kit at most any parts store.
1963 1/2 Falcon 170/C4/8" (alt, a/c, Petronix/42v coil/8mm wires, 16" electric fan, electric fuel pump, Holley 1940, K&N Harley air filter, power dual m/c, 11" disc, 3" drop, Shelby drop, white tuck/roll, Moon steering wheel, '59 Caddy tail lights, fishtail exhaust tip, shaved trim, handles, cowl, fuel, dash, 4" radius trunk/door corners, power windows, 600w iPod system)

DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #6 by DOMER94 » Wed Mar 10, 2010 11:25 pm

ive been looking at the sources i have (internet search and ford shop manual), but am coming up short. can someone advise what model holley carb im dealing with? if i go into a NAPA and ask for a kit , i want to know what im looking for. also, i have never done a rebuild before. can somebody point me to a good manual or reference? i saw a couple of pages on the big post at the top of the forum, but cant tell where they are from.
thanks

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LaGrasta
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Re: hesitation and sometimes stall upon acceleration - 170

Post #7 by LaGrasta » Thu Mar 11, 2010 11:31 am

After 50 years, there is any number of one barrel carbs that might be on your car. Can you post a pic?
1963 1/2 Falcon 170/C4/8" (alt, a/c, Petronix/42v coil/8mm wires, 16" electric fan, electric fuel pump, Holley 1940, K&N Harley air filter, power dual m/c, 11" disc, 3" drop, Shelby drop, white tuck/roll, Moon steering wheel, '59 Caddy tail lights, fishtail exhaust tip, shaved trim, handles, cowl, fuel, dash, 4" radius trunk/door corners, power windows, 600w iPod system)

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Re: hesitation and sometimes stall upon acceleration - 170

Post #8 by LaGrasta » Thu Mar 11, 2010 11:32 am

NOW that I think of it. The same rebuild kit does them all IIRC.
1963 1/2 Falcon 170/C4/8" (alt, a/c, Petronix/42v coil/8mm wires, 16" electric fan, electric fuel pump, Holley 1940, K&N Harley air filter, power dual m/c, 11" disc, 3" drop, Shelby drop, white tuck/roll, Moon steering wheel, '59 Caddy tail lights, fishtail exhaust tip, shaved trim, handles, cowl, fuel, dash, 4" radius trunk/door corners, power windows, 600w iPod system)

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Re: hesitation and sometimes stall upon acceleration - 170

Post #9 by CZLN6 » Thu Mar 11, 2010 11:45 am

HOwdy back Domer:

The OEM carb on a '61 170 should be a Holley 1904/1908 or possibly a 1909. It will be a manual choke. If you go to NAPA and ask for a carb rebuild kit for that year, make and model you will get the right kit- so long as the original carb is still on your car. These Holleys were used on all 144s and 170s until the 1963 model year when they were replaced with Autolite 1100s.

As Tony already said, these rebuild kits are somewhat generic. A kit will cover several models of Holley one barrels.

Adios, David
co-author of the Falcon Performance Handbook
http://www.falcon6handbook.com/

DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #10 by DOMER94 » Fri Mar 12, 2010 3:26 pm

thanks for the great info david, i do still have the stock carb with manual choke. should i also replace the dashpot while im at it?

DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #11 by DOMER94 » Sat Mar 13, 2010 6:59 pm

i had somebody else tell me it was a 5059. does that sound possible? i checked the function of the accelerator pump. the linkage looks fine and when i pump it, a solid stream of fuel comes out. does this leave me with a timing issue? i have attached some pics of the carb. car starts , idles and runs great otherwise. doesnt seem to be smoking or popping on deceleration.
Image
Image
Image

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Re: hesitation and sometimes stall upon acceleration - 170

Post #12 by JackFish » Sat Mar 13, 2010 7:42 pm

A solid stream? It should be quite atomized, like a perfume squirter.
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DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #13 by DOMER94 » Sat Mar 13, 2010 9:04 pm

i will take a look again. i actiated it slowly , but i wil see how it acts under different pressures. it was coming out of a small hole in the side of the throttle openning

DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #14 by DOMER94 » Sat Mar 13, 2010 9:09 pm

just actuated it again with different degrees of speed. it went from a stream to a strong wider stream. definitly not atomized as you described

DOMER94
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Re: hesitation and sometimes stall upon acceleration - 170

Post #15 by DOMER94 » Fri Mar 19, 2010 9:15 pm

well, i checked vaccuum, air/fuel. ended up addin a couple of degrees of timing.. and whoala...acceleratin nicely now.

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